All of the nerves of the body and ganglia
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Transcript of All of the nerves of the body and ganglia
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All of the nerves of the body and gangliaAutonomic nervous system is a specialized part of the PNS
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Cranial Nerves 12 pairs Begin in the brain Designated by
number and name
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Spinal Nerves Originate at spinal
cord and go through openings in vertebrae
31 pairs of spinal nerves
All are mixed nerves
Named in relation to their location on the spinal cord.
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Regulates activities of visceral organs
Not subject to conscious control
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Sympathetic Nervous system the “fight or flight” system when the body perceives danger, SNS sends a message to adrenal medulla to secrete adrenaline heartbeat increases.
Parasympathetic nervous system counters effect of SNS decreases heart rate
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Reflex-unconscious and involuntary In a simple reflex, only a sensory nerve
and motor nerve involved – example, “Knee-jerk” reflex. Using a reflex hammer tap the patellar tendon (on knee) what happens?
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Somatic Nervous System
Part of the peripheral nervous system Carries motor and sensory
information both to and from the central nervous system
Connects skin to sensory organs and all skeletal muscles
Hearing Touch sight
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Nervous Tissue
Bundle of nerve fibers Sensory nerves (afferent) carries
impulses from skin To sense organs, to spinal cord and
brain.
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Motor Nerves(efferent)
Carry messages from the brain and spinal nerves to muscles and glands.
Associative neurons (interneurons) carry impulses from
sensory neurons to motor neurons.
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Questions for PPT and BM three
On the bubble map draw each of the pictures and discuss what each of the picture means related to the central nervous system.
Each picture should be in color
Remember to color the bubble map and write in color.
Make sure the questions cover the entire page.